Flame-retardant polycarbonate molding materials iii

Abstract

The present invention relates to flameproofed polycarbonate (PC) compositions and moulding compounds which have modified impact strength, good mechanical properties, good chemical resistance and high hydrolysis stability. The present patent application further relates to the use of the compositions for the production of moulded articles and to the moulded articles produced from the compositions.

1 . Composition comprising:
 A) 60-95 parts by weight of aromatic polycarbonate and/or aromatic polyestercarbonate,   B) 1.0-15.0 parts by weight of rubber-modified graft polymer,   C) 1.0-14.5 parts by weight of at least one cyclic phosphazene of formula (X):   
       
         
           
           
               
               
           
         
       
       where
 k is 1 or an integer from 1 to 10, optionally a number from 1 to 8 and optionally 1 to 5,
 the trimer content (k=1) being from 60 to 98 mol %, based on component C, 
 
 
       and where
 R are in each case identical or different and are an amine radical, C 1 - to C 8 -alkyl in each case optionally halogenated, optionally with fluorine, optionally methyl, ethyl, propyl or butyl, C 1 - to C 8 -alkoxy, optionally methoxy, ethoxy, propoxy or butoxy, C 5 - to C 6 -cycloalkyl in each case optionally substituted by alkyl, optionally C 1 -C 4 -alkyl, and/or halogen, optionally chlorine and/or bromine, C 6 - to C 20 -aryloxy in each case optionally substituted by alkyl, preferably C 1 -C 4 -alkyl, and/or halogen, optionally chlorine or bromine, and/or hydroxyl, optionally phenoxy or naphthyloxy, C 7 - to C 12 -aralkyl in each case optionally substituted by alkyl, optionally C 1 -C 4 -alkyl, and/or halogen, optionally chlorine and/or bromine, optionally phenyl-C 1 -C 4 -alkyl, or a halogen radical, optionally chlorine, or an OH radical, 
 D) 0-15.0 parts by weight of rubber-free vinyl (co)polymer or polyalkylene terephthalate, 
 E) 0-15.0 parts by weight of one or more additives and 
 F) 0.05 to 5.00 parts by weight, optionally 0.1 to 2.0 parts by weight and optionally 0.1 to 1.0 part by weight of antidripping agent, 
 
       all the parts by weight optionally being scaled so that the sum of the parts by weight of all the components A+B+C+D+E+F in the composition is 100. 
     
     
         2 . Composition according to  claim 1 , wherein the trimer content (k=1) is from 60 to 98 mol %, optionally from 65 to 95 mol %, optionally from 70 to 95 mol % and optionally from 70 to 90 mol %, based on component C. 
     
     
         3 . Composition according to  claim 1 , wherein the proportion of component C is 4.5-8.0 parts by weight. 
     
     
         4 . Composition according to  claim 1 , wherein
 component C is selected from the group consisting of propoxyphosphazenes, phenoxyphosphazenes, methylphenoxyphosphazenes, aminophosphazenes and fluoroalkylphosphazenes.   
     
     
         5 . Composition according to  claim 1 , wherein R=phenoxy. 
     
     
         6 . Composition according to  claim 1 , wherein the trimer content (k=1) is 70-85 mol %, based on component C. 
     
     
         7 . Composition according to  claim 1 , wherein the trimer content (k=1) is from 65 to 85 mol %, the tetramer content (k=2) is from 10 to 20 mol %, the higher oligomeric phosphazene content (k=3, 4, 5, 6 and 7) is from 5 to 15 mol % and the phosphazene oligomer content where k≧8 is from 0 to 1 mol %, based in each case on component C. 
     
     
         8 . Composition according to  claim 1 , wherein component D is present in a proportion of 2.0-12.5 parts by weight. 
     
     
         9 . Composition according to  claim 1 , wherein the thermoplastic aromatic polycarbonates have a weight-average molecular weight of 22,000 to 30,000 g/mol. 
     
     
         10 . Composition according to  claim 1  which comprise as component E at least one additive selected from the group consisting of flameproofing synergistic agents, antidripping agents, lubricants and demoulding agents, nucleating agents, stabilizers, antistatic agents, dyestuffs, pigments, fillers and reinforcing agents. 
     
     
         11 . Composition according to  claim 1 , wherein the graft base of component B is selected from the group consisting of diene rubbers, EP(D)M rubbers, and acrylate, polyurethane, chloroprene and ethylene/vinyl acetate rubbers. 
     
     
         12 . A cyclic phosphazene of formula (X): 
       
         
           
           
               
               
           
         
       
       Capable of being used for preparation of flameproofed polymer composition with increased hydrolysis stability and chemical resistance, 
       where
 k is 1 or an integer from 1 to 10, preferably a number from 1 to 8 and optionally 1 to 5, 
 the trimer content (k=1) being from 60 to 98 mol %, based on component C, 
 
       and where
 R are in each case identical or different and are an amine radical, C 1 - to C 8 -alkyl in each case optionally halogenated, optionally with fluorine, optionally methyl, ethyl, propyl or butyl, C 1 - to C 8 -alkoxy, optionally methoxy, ethoxy, propoxy or butoxy, C 5 - to C 6 -cycloalkyl in each case optionally substituted by alkyl, optionally C 1 -C 4 -alkyl, and/or halogen, optionally chlorine and/or bromine, C 6 - to C 20 -aryloxy in each case optionally substituted by alkyl, optionally C 1 -C 4 -alkyl, and/or halogen, optionally chlorine or bromine, and/or hydroxyl, optionally phenoxy or naphthyloxy, C 7 - to C 12 -aralkyl in each case optionally substituted by alkyl, preferably C 1 -C 4 -alkyl, and/or halogen, optionally chlorine and/or bromine, optionally phenyl-C 1 -C 4 -alkyl, or a halogen radical, optionally chlorine, or an OH radical. 
 
     
     
         13 . A composition according to  claim 1  capable of being used for production of an injection-moulded and/or thermoformed article. 
     
     
         14 . Moulded article obtainable from a composition according to  claim 1 .